At one point it's insinuated that a female character is raped by a group of men and left for dead in the streets before she was turned into a vampire & although nothing is shown it could be a trigger for some.

A Female Vampire kills several people by snapping there necks(We see Many Dead bodies lying on the ground).The Female Vampire then tries to break a wolves jaw,Then a Woman stabs herself in the stomach with a Knife(We see Blood).The Vampire is then ripped by the wolf.

There is an extended fight scene towards the end of the movie. Since the fighters are mostly vampires, there is little blood shown, although some characters are wounded, injured and decapitated. For example, a Vampire kills a werewolf by bitting it then another werewolf rips the Vampire into shreds. Later we see all their corpses are burning.